chore(db): 提交初始数据库迁移文件

drizzle/20260401114858_cultured_lady_mastermind/migration.sql

@@ -0,0 +1,7 @@
+CREATE TABLE "todo" (
+	"id" uuid PRIMARY KEY,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"title" text NOT NULL,
+	"completed" boolean DEFAULT false NOT NULL
+);